Coating for piles



I06. COMPOSITIONS,

COATING OR PLASTIC.

UNITED STATES PATENT OFFICE.

FREDERICK E. LAMPERT, OF' SAN FRANCISCO, CALIFORNIA, ASSIGNOR Oh ONE-HALE TO'ANSON S. LEVAKE, OF TACOMA, TVASHINGTON.

COATING FOR PILES, 84C.

SPECIFICATION forming part of Letters Patent No. 454,744, dated June 23, 1891. Application filed December 3, 1890- Serial No. 373,454.v (No specimens.)

To aZZ whom it may concern.-

Be it known that I, FREDERICK E. LAMPERT, I

-" applied to pilesand other submerged timber as a coating before submerging the same, will prevent teredo and other worms boring into and weakening the same, and also preserve the timber againstwater-rot or decay.

With these objects in view my invention consists in compounding a mixture of coaltar, asphalt, oxide of copper, fish-oil, oxalic acid, and salt, in the proportions hereinafter set forth, and then coating a stripped and trimmed pile or timber With said compound in a heated and liquid state.

In a compound of one hundred parts, by weight, the several ingredients are mixed in the following proportions: asphalt, seventythree parts; coal-tar, nineteen parts; oxide of copper, four and three-fourths parts; fish-oil, two parts; oxalic acid, one-fourth part; salt, one one-hundredth part. These ingredients are thoroughly intermingled and heated until the mass assumes a liquid "state, when a thorough mixture will take place.

.In order to apply the coating compound, the pile or other timber to be submerged is preferably stripped of its bark and the knot-s trimmed down. The pile thus stripped and trimmed is then given a light coat of fish-oil and oxide of copper and allowed to dry. The compound is then applied when in a liquid state, and when dried the pile is ready for use. The coating thus applied is impenetra- 4c I secure a series of thin strips to the pile, ex- 7V tending from end to end of the same. These strips, about six in number, are placed around the pile, and in handling the same all damage will be sustained by the strips, thus preventing the coating compound being nicked or otherwise damaged.

Having thus described my invention, what I claim is 1. A compound i or coating piles and other timbers, consisting of a mixture of asphalt," 6o

coal-tar, oxide of copper, fisl oil, oxalic acid, and salt, in about thei'proportions specified, and for the purpose set forth.

2. A compound for coating piles and other timbers, consisting of asphalt, seventy-three parts; coal-tar, nineteen parts oxide of cs gper, four and three-fourths parts; fish-oil, two parts; oxalic acid, one-fourth part, and salt, one part, all mixed in the manner specified.

3. An improved compound for co'atingpiles,

consisting of asphaltum, oxide of copper, fishoil, oxalic acid, and salt, all mixed in about the proportions specified.

FREDERICK E. LAMPERT.

This coat- 45 

